KR200491441Y1 - Pressure reducing valve having low noise - Google Patents

Abstract

The low-noise pressure-reducing valve of the present invention basically uses a partition wall with a through hole to define a first space connected to an inlet and a second space connected to an outlet, a diaphragm blocking the open upper portion of the lower valve body, And an upper valve body coupled to the opened upper portion of the lower valve body and defining a third space together with the diaphragm, additionally located in the second space to seal and open the through hole, and sealing disk via the through hole Stem that interlocks the diaphragm, pressure regulating spring that presses the diaphragm in the third space, and pressure regulating screw that adjusts the elasticity of the pressure regulating spring on the opposite side of the diaphragm by being engaged by screwing from the top of the pressure regulating spring among the upper valve bodies, And a noise reduction damper in contact with the sealing disc on the opposite side of the stem in the first space and cushioning the movement of the stem and the sealing disc.

Description

PRESSURE REDUCING VALVE HAVING LOW NOISE}

The present invention relates to a pressure-reducing valve, and more particularly, to a low-noise pressure-reducing valve capable of eliminating or reducing noise and vibration generated in the decompression process.

In general, a pressure reducing valve is a valve that depressurizes a liquid when the pressure of the liquid is higher than the intended use, and maintains the pressure constant after depressurizing.

Korean Patent Registration Nos. 10-0954720 and 10-1679802 disclose pressure reducing valves that can facilitate pressure control and have noise protection. The pressure-reducing valve includes a main body including a first space on the inlet side and a second space on the outlet side, a through hole formed between the two side spaces and opened and closed by a disk, and a disk fixed at one end; The casing coupled to the upper opening of the first space, the diaphragm fixedly arranged at the lower portion of the casing and the other end of the stem fixed to the center, disposed inside the casing and supported by the lower diaphragm and the upper fluid pressing piece An operating unit including a spring to be; A display unit formed integrally on the upper surface of the casing and showing the pressure in a radial direction from the center, an indicator arranged on the upper side of the display and rotating to select a pressure level from the pressure indenter, integrally formed with the indicator and penetrating through the display unit inside the casing It includes an adjusting portion including a rotating shaft that is screwed with the pressing piece of.

The pressure-reducing valve is capable of adjusting the pressure reduction without having a measuring instrument such as a pressure gauge or a calibrator, and it is easy and fast to adjust / re-adjust the pressure by eliminating the need for visual measurement or fine adjustment, and repeatability, accuracy and speed of adjustment in the same standard. It can have the advantage of being very good.

However, in the above structure, vibration may occur due to frequent opening and closing of the disc, and the vibration may be converted into physical shaking or noise, and may cause unpleasant noise through the entire pipe.

The present invention provides a low-noise pressure reducing valve that can prevent the generation of unpleasant noise.

The present invention provides a low-noise pressure-reducing valve that can adjust various physical characteristics according to the working environment in which the piping is installed, and is very easy to adjust.

According to an exemplary embodiment of the present invention, the low-noise pressure-reducing valve basically comprises a lower valve body and a lower valve body defining a first space connected to an inlet and a second space connected to an outlet using a partition wall having a through hole. And a diaphragm blocking the open upper portion, and an upper valve body coupled to the opened upper portion of the lower valve body to define a third space together with the diaphragm, and additionally located in the second space to seal and open the through hole. , Stem that interlocks the sealing disc and the diaphragm through the through hole, pressure regulating spring that presses the diaphragm in the third space, and is coupled by screwing from the top of the pressure regulating spring among the upper valve bodies to the pressure regulating spring from the opposite side of the diaphragm. It may further include a pressure adjusting screw for adjusting the elasticity, and a noise reduction damper in contact with the sealing disc on the opposite side of the stem in the first space and cushioning the movement of the stem and the sealing disc.

The noise reduction damper is for absorbing or alleviating the vibrations of the stem and the sealing disc, and suppresses noise generation by dampers such as bellows supports absorbing vibrations that may occur in the pressure reducing valve due to frequent opening and closing while adjusting pressure. I can do it.

In addition, in order to change the damping performance of the damper by the bellows support or the like, the lower valve body may further include a noise control screw that is engaged by screwing from the bottom of the noise reduction damper to elevate the support surface of the noise reduction damper.

As a noise reduction damper, a bellows support made of metal or rubber may be used, but a hydraulic cylinder, a coil spring, or a combination thereof may also be used.

A connection ring provided between the diaphragm and the through hole in the first space, the side open cylinder having an open side, a filter mesh provided on the side of the side open cylinder, and a connection ring provided at the bottom of the side open cylinder to sealably contact the sealing disc, and It may further include a safety packing provided at the boundary between the lower end of the side opening cylinder and the connecting ring.

The side opening cylinder can enter from the open top of the lower valve body and can be provided to support the bottom surface of the diaphragm. The side opening cylinder allows the entry of the fluid flowing from the first space to the second space by opening the side, and can guide the up and down movement of the stem to the upper part, and the through hole is substantially in contact with the sealing disc. It is possible to form more stable contact than direct contact with the formed partition wall.

The fluid is introduced from the inlet and is discharged from the outlet through the first space, the through hole and the second space, and the filter mesh filters the suspended solids and the like to prevent the floating matter from flowing into the outlet, and occasionally connects rings and seals. It is possible to prevent a debris from interfering between the discs and interfering with the depressurization operation.

In addition, the lower end of the side opening cylinder may be damaged by frequent contact. In the present invention, a connection ring may be formed of a material having a relatively high strength, for example, metal, and the connection ring and the sealing disc may substantially contact each other. have.

In addition, the noise control screw pushes up the noise reduction damper and sealing disc, which may cause cracks in the sealing between the outer surface of the side opening cylinder and the through hole, and further adjusts the noise by adding a safety packing between the connecting ring and the bottom of the side opening cylinder. The problem that can occur with the application of screws can be overcome.

The side opening cylinder may be provided in a structure that blocks the space between the first space and the lower portion of the diaphragm, and the space between the second space and the lower portion of the diaphragm communicates with each other to press the bottom surface of the diaphragm under pressure of the second space. In this case, the diaphragm and the noise reduction damper together can provide pressure against the pressure regulating spring, and increase the pressing force of the pressure regulating spring or absorb mutual vibration to suppress the occurrence of noise.

The low-noise decompression valve of the present invention can reduce or eliminate unpleasant noise, a chronic problem, and overcome the problem by allowing the physical characteristics of noise reduction to be adjusted in the field even when the low-noise function is not effective according to various installation environments. It is possible to increase the user's convenience by making it easy to perform adjustment work in the field.

1 to 3 are cross-sectional views for explaining the structure and operation mechanism of the low-noise pressure reducing valve according to an embodiment of the present invention.
Figure 4 is a cross-sectional view for explaining the structure and operation mechanism of the low-noise pressure reducing valve according to another embodiment of the present invention.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings, but the present invention is not limited or limited by the embodiments. For reference, in the present description, the same numbers refer to substantially the same elements, and the contents described in other drawings may be cited and described under these rules, and repeated contents that are deemed to be obvious to those skilled in the art or may be omitted.

1 to 3 are cross-sectional views for explaining the structure and operation mechanism of the low-noise pressure reducing valve according to an embodiment of the present invention.

1 to 3, the pressure reducing valve 100 according to the present embodiment includes an inlet IN and an outlet OUT, and a fluid such as liquid or gas is a first space R1 at the inlet IN ), Passing through the through-hole of the partition wall 112 and moving from the first space R1 to the second space R2, and from the second space R2 to the outlet OUT.

Specifically, the pressure reducing valve 100 may form a rough structure by the combination of the lower valve body 110 and the upper valve body 116. The lower valve body 110 includes a partition wall 112 through which a through hole is formed, and a space inside the lower valve body 110 by the partition wall 112 is a first space R1 connected to an inlet (IN) and an outlet ( OUT) and may be divided into a second space R2 connected to it.

The upper end of the lower valve body 110 is open, and the upper end of the lower valve body 110 may be fastened to the upper valve body 116 by screwing or the like. Before combining the lower valve body 110 and the upper valve body 116, a diaphragm 114 with a perimeter sealed therebetween may be provided, and the first space R1 below is defined by the diaphragm 114 The third space R3 may be defined by the upper valve body 116.

Specifically, the upper end of the upper valve body 116 is also made open, but may be blocked by the pressure adjusting screw 160.

According to this embodiment, the pressure reducing valve 100 includes a sealing disc 130, a stem 120, a pressure adjusting spring 150, a pressure adjusting screw 160, a noise reduction damper 170, and a noise adjusting screw 180 It may further include.

The sealing disk 130 is fixed to the lower end of the stem 120, and the stem 120 can be interlocked with the diaphragm 114 while moving up and down with the sealing disk 130. Since the upper surface of the diaphragm 114 is elastically pressed by the pressure regulating spring 150, the elasticity of the pressure regulating spring 150 may affect the boundary at which the sealing disk 130 is closed.

Referring to FIG. 2, when the pressure in the second space R2 is high, the sealing disk 130 is pushed upward to prevent the through hole, that is, the side opening cylinder 140 and the connection ring 144, which will be described later, are in contact with each other. . In addition, when the pressure in the second space R2 falls below a predetermined standard, a gap between the connecting ring 144 and the sealing disk 130 is opened again, thereby enabling fluid flow.

The side opening cylinder 140 may be provided to block the first space R1 and the space R4 under the diaphragm. In this case, the second space R2 and the lower space R4 of the diaphragm 114 are communicated by the interconnecting passages 118 to press the bottom surface of the diaphragm 114 with the pressure of the second space R2. It can be provided as a structure. For reference, a plurality of holes communicating with a space connected to the fourth space R4 and the passage 118 below the diaphragm 114 may be formed on the flange formed on the upper side of the side opening cylinder 140 along the circumference. Can be.

In this case, the diaphragm 114 and the noise reduction damper 170 together may provide pressure opposed to the pressure regulating spring 150, increase the pressing force of the pressure regulating spring 150 or the noise reduction damper 170 By absorbing vibration, it is possible to suppress the generation of noise due to vibration of the stem 120 and the sealing disk 130.

Through this process, the pressure of the second space R2 may not exceed a specific pressure, and by using this, the fluid pressure of the outlet OUT may be uniformly maintained at a desired pressure.

According to the illustrated, in the low-noise pressure-reducing valve 100 of the present embodiment, the sealing disk 130 is located in the lower portion of the through hole, that is, in the second space R2, and rises to close the through hole and descend to open the through hole. . In addition, the stem 120 is integrally engaged with the sealing disk 130 and can be moved up and down under the guidance of the side opening cylinder 140, and can be fastened through a binding plate located on the opposite side of the diaphragm 114 Do. Of course, the binding plate or disc may function to be elastically supported by the pressure regulating spring 150.

The pressure adjusting screw 160 is engaged by screwing in the upper portion of the upper valve body 116, and a hexagonal groove or the like is formed on the upper surface of the pressure adjusting screw 160 to move up and down. Therefore, as described in FIG. 2, the pressure in the second space R2 in which the sealing disk 130 can be closed can be adjusted. In general, when the pressure adjusting screw 160 is lowered, the pressure of the outlet OUT increases, and when the pressure adjusting screw 160 is raised, the pressure of the outlet OUT may be reduced.
In addition, the pressure adjusting screw 160 may be formed with a diameter larger than the outer diameter of the pressure adjusting spring 160, and can be raised and lowered for pressure control while blocking the upper opening of the upper valve body 116 as a whole. In addition, in response to the upper boundary of the upper valve body 116, a depth adjustment combined packing 162 is provided around the pressure adjusting screw 160, and the user uses the depth adjustment combined packing 162 and combines depth adjustment. While viewing the height or thickness at which the packing 162 is exposed, the elevation depth of the pressure adjusting screw 160 can be adjusted.

Separated from this, the noise adjusting screw 180 is also formed at the bottom of the second space R2, that is, at the bottom of the lower valve body 110, and can be moved up and down by screwing. However, the noise adjusting screw 180 may physically raise or lower the support surface of the noise reduction damper 170, but this may operate regardless of the pressure control of the outlet OUT.
For the noise control function of the noise control screw 180, the length (H) of the male screw portion of the noise control screw 180 corresponds to the noise control screw 180, the length (h) of the female screw portion formed in the lower valve body 110 ).

The noise reduction damper 170 is for absorbing or alleviating vibrations of the stem 120 and the sealing disk 130 against the pressure regulating spring 150, and the sealing disk 130 can move up and down while adjusting the pressure. However, the noise reduction damper 170 such as a bellows support can absorb vibrations that may occur in the pressure reducing valve 100 due to frequent opening and closing. That is, the noise reduction phenomenon can be expected by the interaction by the pressure reducing spring 150 and the noise reduction damper 170 operating on the opposite side than the situation in which only one direction of pressure is present with respect to the pressure adjusting spring 150. .

In addition, since the relative pressure can be adjusted, the pressing force of the pressure adjusting spring 150 using the pressure adjusting screw 160 can be further increased, and correspondingly, the vibration of the stem 120 and the sealing disk 130 is further increased. It can be suppressed with great force.

The bottom surface of the second space R2 and the diaphragm 114 communicate with each other through a passage. Therefore, the pressure of the second space R2 provides a pressure that rises to the bottom surface of the diaphragm 114 to control the force against the pressure regulating spring 150 together with the noise reduction damper 170. In this process, the noise reduction damper 170 may further improve the operation of the diaphragm 114.

However, there may be a case in which noise is not reduced only because there is a noise reduction damper 170 in a specific environment. This may be affected by the resonance frequency, etc., the noise adjusting screw 180 can be used to change the damping performance of the damper by the bellows support, etc., as shown in FIG. 3, for effective height adjustment to effectively reduce noise The user can try various locations in various ways.

The side opening cylinder 140 may be formed using synthetic resin, and is provided between the diaphragm 114 and the through hole in the first space R1, and may be formed to open the side. In addition, a filter mesh 142 may be provided on the side of the side opening cylinder 140 with the side open.

The side opening cylinder 140 may enter from the open top of the lower valve body 110, and may function to support the bottom surface of the diaphragm 114 or to press the periphery of the diaphragm 114 to seal it. The side opening cylinder 140 allows the entry of the fluid flowing from the first space (R1) to the second space (R2) by opening the side surface, and is coupled with the stem (120) in the upper and lower sides of the stem (120). You can guide your workout.

In addition, since the lower end of the side opening cylinder 140 is substantially in contact with the sealing disk 130 through the connecting ring 144, it is more stable than the direct contact between the partition wall 112 having the through hole and the sealing disk 130. Contact can be established.

The filter mesh 142 is attached to the side of the side opening cylinder 140, while the fluid is introduced from the inlet (IN) and discharged from the outlet through the first space (R1), through and second space (R2), It can function as a filter for suspended solids from the fluid. In addition, when the filter mesh 142 is not present, foreign matter or floating matter may be caught between the connection ring 144 and the sealing disk 130 to prevent depressurization, and the filter mesh 142 may prevent this.

The connecting ring 144 is an accessory that can be substantially connected to the sealing disk 130, and may be formed of a material having a relatively high strength compared to the side opening cylinder 140, for example, metal.

The low-noise pressure-reducing valve 100 according to this embodiment is characterized in that the noise control screw 180 pushes up the noise reduction damper 170 and the sealing disc 130, in this case, with the outer surface of the side opening cylinder 140. Looping may occur in the sealing between holes. Therefore, in this embodiment, in order to solve this, a safety packing 146 may be further added between the connection ring 144 and the lower end of the side opening cylinder 140.

Figure 4 is a cross-sectional view for explaining the structure and operation mechanism of the low-noise pressure reducing valve according to another embodiment of the present invention.

Referring to FIG. 4, the pressure reducing valve 200 according to the present embodiment includes an inlet IN and an outlet OUT, and a lower valve body 110 including a first space R1 and a second space, Diaphragm 114, may include an upper valve body 116 defining a third space (R3), stem 120, side opening cylinder 140, filter mesh 142, connecting ring 144, The pressure adjusting spring 150, the pressure adjusting screw 160, and the like may be included.

However, the coil spring 270 may be included as a noise reduction damper, and a noise control screw 280 suitable for adjusting the coil spring 270 may be included. As shown, it is also possible to replace and use the spring 270 and the noise reduction screw 280 as a noise reduction damper while maintaining the parts of the previous embodiment as they are.

As described above, the present invention has been described with reference to preferred embodiments, but those skilled in the art variously modify and change the present invention without departing from the spirit and scope of the present invention as set forth in the claims below. You can understand that you can.

100: pressure reducing valve 110: lower valve body
112: bulkhead 114: diaphragm
116: upper valve body 120: stem
130: sealing disc 140: side opening cylinder
142: filter mesh 144: connecting ring
150: pressure adjusting spring 160: pressure adjusting screw
170: noise reduction damper 180: noise control screw

Claims (5)

The lower valve body 110 defining the first space R1 connected to the inlet IN and the second space R2 connected to the outlet OUT using the through-hole partition wall 112, the lower valve A diaphragm 114 blocking the open top of the body 110, and an upper valve coupled to the open top of the lower valve body 110 to define a third space R3 together with the diaphragm 114 In the pressure reducing valve (100) comprising a body (116),
A sealing disk 130 positioned in the second space R2 to open and close the through hole;
A stem 120 for interlocking the sealing disk 130 and the diaphragm 114 via the through hole;
A pressure regulating spring 150 that presses the diaphragm 114 in the third space R3;
A pressure adjusting screw (160) for adjusting the elasticity of the pressure regulating spring (150) on the opposite side of the diaphragm (114) by being engaged by screw coupling at the top of the pressure regulating spring (150) of the upper valve body (116);
A noise reduction damper 170 in contact with the sealing disk 130 on the opposite side of the stem 120 in the first space R1 and buffering movements of the stem 120 and the sealing disk 130; And
It includes; a noise control screw 180 that is engaged by screwing in the lower portion of the noise reduction damper 170 among the lower valve bodies 110 to elevate a support surface of the noise reduction damper 170;
The noise reduction damper 170 provides a continuous opposite force against the pressure regulating spring 150 to seal the opening in a direction to block the through hole with a variable force by the noise adjusting screw 180. Support the disk 130,
For the noise control function of the noise control screw 180, the length (H) of the male screw portion of the noise control screw 180 is a female screw formed in the lower valve body 110 corresponding to the noise control screw 180 Longer than the length (h) of the negative, the noise adjustment screw 180 physically raises or lowers the support surface of the noise reduction damper 170,
The pressure adjusting screw 160 is formed with a diameter larger than the outer diameter of the pressure adjusting spring 150, and combined with depth adjustment around the pressure adjusting screw 160 corresponding to the upper boundary of the upper valve body 116 Low noise pressure reducing valve characterized in that the packing (162) is provided. According to claim 1,
The noise reduction damper 170 is a low noise pressure reducing valve, characterized in that the bellows support or spring. According to claim 1,
A filter mesh 142 provided between the diaphragm 114 and the through hole in the first space R1, and provided on the side of the side opening cylinder 140 and the side opening cylinder 140 with side openings, It is provided at the lower end of the side opening cylinder 140, the connection ring 144 sealingly contacting the sealing disk 130 and the lower end of the side opening cylinder 140 and the connection ring 144 is in contact with the boundary Low noise pressure-reducing valve, characterized in that it further comprises a safety packing (146) provided. According to claim 3,
The side opening cylinder 140 blocks the first space R1 and the lower space of the diaphragm 114, and the second space R2 and the lower space of the diaphragm 114 are in communication with each other. The pressure of the second space R2 presses the bottom surface of the diaphragm 114, and the diaphragm 114 and the noise reduction damper 170 provide pressure opposed to the pressure regulating spring 150. Low noise pressure reducing valve. delete

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